Practice questions coming soon.

Time's up

Oxygenation is the process of taking in oxygen, moving it through the lungs into the bloodstream, and delivering it to body tissues. Adequate oxygenation is essential for cellular function, tissue perfusion, and organ survival.

When oxygenation is impaired, the nurse must recognize the problem early and intervene quickly to prevent deterioration.

• Respiratory rate: normal is about 12 to 20/min.
• SpO₂: normal is usually about 95% to 100%, unless otherwise expected for the client.
• Assess depth, rhythm, and effort of breathing.
• Observe for use of accessory muscles, retractions, nasal flaring, or tripod position.
• Assess lung sounds: clear, diminished, crackles, wheezes, or rhonchi.
• Observe skin color, mental status, ability to speak, and activity tolerance.
• Check cough, sputum, chest pain, and any signs of distress.

The nurse combines respiratory assessment findings, oxygen saturation, labs, and diagnostics to determine if the client is oxygenating adequately or showing signs of respiratory compromise.

• Low SpO₂ + increased respiratory rate + accessory muscle use may suggest hypoxia or respiratory distress.
• Crackles + low oxygen saturation may suggest fluid in the lungs or pneumonia.
• Wheezing may suggest bronchoconstriction or airway narrowing.
• Diminished breath sounds may suggest poor air movement, collapse, or obstruction.
• Restlessness and confusion may be early signs of hypoxia.

Labs and diagnostics that help support the picture:

• ABGs: evaluate oxygenation, ventilation, and acid-base status.
• PaO₂: normal is about 80 to 100 mm Hg.
• PaCO₂: normal is about 35 to 45 mm Hg.
• pH: normal is about 7.35 to 7.45.
• HCO₃⁻: normal is about 22 to 26 mEq/L.
• CBC: WBC normal is about 5,000 to 10,000/mm³; elevated WBC may suggest infection.
• Hemoglobin: normal is about 12 to 18 g/dL; low Hgb can reduce oxygen-carrying capacity.
• Chest x-ray: may show pneumonia, atelectasis, or fluid overload.

• Position the client to maximize lung expansion, such as High Fowler’s if tolerated.
• Apply oxygen as ordered and monitor response.
• Encourage coughing, deep breathing, and incentive spirometry when appropriate.
• Promote mobility and repositioning to improve ventilation.
• Monitor oxygen saturation, respiratory effort, and lung sounds closely.
• Report worsening respiratory status promptly.
• Document findings and interventions clearly.

• Focused respiratory assessment
• Counting respiratory rate accurately
• Using pulse oximetry correctly
• Applying oxygen devices safely
• Positioning the client to improve breathing
• Encouraging coughing, deep breathing, and incentive spirometry

• Respiratory rate often changes before oxygen saturation drops.
• Restlessness may be an early sign of hypoxia.
• Clients can look “okay” while still compensating hard.
• Low hemoglobin can impair oxygen delivery even if the lungs are working.
• Students often focus only on SpO₂ and forget the full respiratory picture.

Oxygen devices, ABG review, and respiratory assessment reminders coming soon.